Bump regex from 1.4.5 to 1.5.4

Bumps [regex](https://github.com/rust-lang/regex) from 1.4.5 to 1.5.4.
- [Release notes](https://github.com/rust-lang/regex/releases)
- [Changelog](https://github.com/rust-lang/regex/blob/master/CHANGELOG.md)
- [Commits](rust-lang/regex@1.4.5...1.5.4)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Cargo.lock

@@ -25,7 +25,7 @@ num-derive = "^0.3"
 num-traits = "^0.2"
 petgraph = "^0.5"
 phf = { version = "^0.8", features = ["macros"] }
-regex = "^1.4"
+regex = "^1.5"
 serde = { version = "^1.0", features = ["derive"] }
 termcolor = "^1.1"
 

Cargo.toml

@@ -16,7 +16,7 @@ clap = "^2.33"
 crossbeam = "^0.8"
 globset = "^0.4"
 num_cpus = "^1.13"
-regex = "^1.4"
+regex = "^1.5"
 rust-code-analysis = { path = "..", version = "0.0"}
 serde = "^1.0"
 serde_cbor = "^0.11"